nixos/nextcloud: Adapt cron frequency to changed upstream requirement

https://docs.nextcloud.com/server/22/admin_manual/configuration_server/background_jobs_configuration.html

Says that the job should be run every 5 minutes.
Nextcloud shows a warning in the settings screen whenever the last run
was more than 10 minutes ago.

Changed files
+1 -1
nixos
modules
services
web-apps
+1 -1
nixos/modules/services/web-apps/nextcloud.nix
···
{ systemd.timers.nextcloud-cron = {
wantedBy = [ "timers.target" ];
timerConfig.OnBootSec = "5m";
-
timerConfig.OnUnitActiveSec = "15m";
timerConfig.Unit = "nextcloud-cron.service";
};
···
{ systemd.timers.nextcloud-cron = {
wantedBy = [ "timers.target" ];
timerConfig.OnBootSec = "5m";
+
timerConfig.OnUnitActiveSec = "5m";
timerConfig.Unit = "nextcloud-cron.service";
};